CN87215825U

CN87215825U - Graph plotter for archimedes spisral

Info

Publication number: CN87215825U
Application number: CN 87215825
Authority: CN
Inventors: 李华松
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-11-26
Filing date: 1987-11-26
Publication date: 1988-11-02

Abstract

The utility model relates to a ' graph plotter for Archimedes vortex lines ', which can be used for drawing the ' Archimedes vortex lines ' quickly. When a graph is drawn, the graph plotter uses the features that rack bars rotate around gears, and the rack bars can do a straight-line motion; thus, the rack bars pass through a rotor of a support point on a swing rod to change the support point to change the swing distance to draw out various needed ' Archimedes vortex lines '. The ' graph plotter for Archimedes vortex lines ' has the advantages of simple drawing and standard drawing; the graph plotter for 'Archimedes vortex lines ' can also be used as a compass. The utility model is composed of a needle-fixing device, a main body and a swing mechanism.

Description

Graph plotter for Archimedes spisral

The utility model is a kind of drawing instrument.

Draw the system Archimedes spiral at present and all use the way of multiple spot line, drawing is complicated, and is inaccurate.

The purpose of this utility model provides the drawing equipment of a kind of can draw rapidly " Archimedes spiral ".This drawing equipment utilization mapping hour rack (3-1) rotates around gear (1-2).The characteristics of tooth bar (3-1) energy moving linearly, tooth bar (3-1) go up fulcrum rotor (3-9) change fulcrum by fork (3-6) and reach change pendulum distance, and various required " Archimedes spirals " draw." Archimedes spiral drawing equipment " drawing is easy, and standard also can be worked as garden rule and use.

Table 1 is " Archimedes spiral drawing equipment " structural table

Fig. 1 is " Archimedes spiral drawing equipment " structure chart

Further specify referring to chart: the utility model is by deciding needle device (1), main body (2), swing mechanism (3) composition. Gear (1-2) is fixed on to decide to pack on the pin (1-1) to be decided punch block (1-4) and can rotate. Rotation screw (1-3) with decide punch block (1-4) and lock. Decide punch block (1-4) and be contained in crossbearer (2-1), can rotate on the lower cross frame (2-3). Set screw (1-5) set screw (1-6) of deciding on the punch block (1-4) can the same crossbearer (2-1), lower cross frame (2-3) location. The same tooth bar of gear (1-2) (3-1) cooperates. Upper crossbearer (2-1), lower cross frame (2-3), helical pitch scale (2-4) consist of

Type, the same lower cross frame of upper crossbearer (2-1) (2-3) have elongated groove alive, and it is balance that two elongateds are lived between the grooves. The elongated of upper crossbearer (2-1) the movingly tooth bar (3-1) of living in the groove has a location screw (2-2) to locate tooth bar (3-1) on the upper crossbearer (2-1). Tooth bar (3-1) a same gear (1-2) cooperates. The other end is fixed with pin (3-2). The elongated that the same fork of pin (3-2) (3-6) is one is lived groove movingly, the elongated of fork (3-6) other end is lived groove with the pin (3-5) that is fixed on one on scale (3-3) movingly, the elongated that scale (3-3) is contained in lower cross frame (2-3) is lived can be movable in the groove, pen stand (3-4) is fixed on the scale (3-3) and can rotates, and the upper cover of fork (3-6) has fulcrum rotor (3-9) to move. On vernier seat (3-7), vernier seat (3-7) cooperates with helical pitch scale (2-4) the fulcrum rotor movingly, and vernier seat (3-7) can move on helical pitch scale (2-4). Vernier seat (3-7) side has a location screw (3-8) to locate, and on the helical pitch scale (2-4) the helical pitch yardstick is arranged.

Embodiment:

1, deciding punch block (1-4) near pen stand (3-4), set screw (1-5), set screw (1-6) location.Nib is to pin (1-1) tip certainly, and vernier seat (3-7) side is aimed at helical pitch scale (2-4) and gone up your required helical pitch reading, set screw (3-8) location.One handgrip is decided pin (1-1) and is fixed on the chart board and do not rotate, and another hand rotates rotation screw (1-3) and draws, and what drew this moment is " Archimedes spiral ".

2, set screw (2-2) location is rotated and is decided pin (1-1) picture, and what drew this moment is the garden line.

" Archimedes spiral drawing equipment " structural table

Table 1

Claims

1, Archimedes spiral drawing equipment, by deciding needle device (1), main body (2), swing mechanism (3) is formed, it is characterized in that deciding to have in the needle device (1) tooth bar (3-1) on the same swing mechanism of a gear (1-2) (3) to cooperate, one of tooth bar (3-1) connects fork (3-6), and fork (3-6) other end connects scale (3-3), is with fulcrum rotor (3-9) on fork (3-3).

2, Archimedes spiral drawing equipment according to claim 1 is characterized in that tooth bar (3-1) and scale (3-3) are that balance is contained on the last crossbearer (2-1) and lower cross frame (2-3) of main body (2).